CN109136705A - A kind of Nb-W-ZrC-B alloy and preparation method thereof - Google Patents
A kind of Nb-W-ZrC-B alloy and preparation method thereof Download PDFInfo
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- CN109136705A CN109136705A CN201811116953.9A CN201811116953A CN109136705A CN 109136705 A CN109136705 A CN 109136705A CN 201811116953 A CN201811116953 A CN 201811116953A CN 109136705 A CN109136705 A CN 109136705A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C27/00—Alloys based on rhenium or a refractory metal not mentioned in groups C22C14/00 or C22C16/00
- C22C27/02—Alloys based on vanadium, niobium, or tantalum
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- C22C1/00—Making non-ferrous alloys
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C32/00—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ
- C22C32/0047—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with carbides, nitrides, borides or silicides as the main non-metallic constituents
- C22C32/0052—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with carbides, nitrides, borides or silicides as the main non-metallic constituents only carbides
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Abstract
The invention discloses a kind of Nb-W-ZrC-B alloys and preparation method thereof, it is related to field of alloy preparation technology.It is made of the raw material of following mass percent: W 5%-35%, ZrC 2%-8%, B 1%-5%, surplus are Nb and inevitable impurity, it is uniformly mixed the preparation method comprises the following steps: W powder, ZrC powder, B powder and Nb powder are placed in ball mill, is crushed after drying and obtain mixed powder；Mixed powder is placed in hot-pressed sintering furnace and carries out hot pressed sintering, obtains Nb-W-ZrC-B alloy sintered compact；By sintered body hot extrusion, Nb-W-ZrC-B alloy is obtained.Nb-Si-Ti-W-Cr alloy prepared by the present invention has good comprehensive mechanical property and antioxygenic property, can use in 1400 DEG C of air environments.
Description
Technical field
The present invention relates to field of alloy preparation technology, and in particular to a kind of Nb-W-ZrC-B alloy and its preparation side
Method.
Background technique
Advanced aero engine needs a kind of new material that temperature extremes is used more than current nickel based super alloy, this green wood
Material need to have the characteristics that high-melting-point, low-density, 1300-1400 DEG C of anti-oxidant and excellent elevated temperature strength, and refractory metal has
The features such as fusing point is high, elevated temperature strength is high and elasticity modulus is big, people start to rethink refractory metal in aero-engine again
Application.
In all refractory metals, niobium is most likely in aero-engine and is applied.Niobium and other intensified elements
There is high solid solubility limit, niobium has good ductility and relatively low density (8.56g/cm at room temperature3), but single-phase
In the case of, its mechanical property is greatly improved to reach the limited promise applied on high thrust-weight ratio engine, and the antioxygen of niobium
It is very poor to change performance, further limits its use scope.Although niobium alloy is in the limit than traditional Ni-based and cobalt-base superalloy
Operating temperature also the temperature of Gao Ji Baidu when, still there is certain mechanical property, but as the temperature rises, intensity sharply under
Drop, and its antioxygenic property is poor, and even at 600 DEG C " pest " oxidative phenomena just occurs for pure niobium, this seriously constrain niobium and
Niobium alloy application.
Ceramic matric composite can use at a high temperature of 1600 DEG C, but there is low congenital of poor thermal conductivity and toughness
Property defect, and lack design and application experience, in addition, expensive, the disadvantages of cannot recycling of ceramic matric composite
Limit its practical application.Therefore, it is necessary to by second-phase dispersion reinforcing come the shortcomings that overcoming single-phase niobium alloy, and pass through alloy
Change and technology controlling and process, make ceramic phase fine particle even dispersion on niobium matrix, to make its room-temperature mechanical property, high-temperature mechanics
Performance and high-temperature oxidation resistance are significantly improved.Based on this, it is outstanding to design a kind of Nb-W-ZrC-B alloy and preparation method thereof
For necessity.
Summary of the invention
In view of the shortcomings of the prior art, object of the present invention is to be to provide a kind of Nb-W-ZrC-B alloy and its system
Preparation Method has good comprehensive mechanical property and antioxygenic property, can use in 1400 DEG C of air environments, at room temperature
With good plasticity, there is very high intensity, alloy preparation method is easy, use easy to spread under high temperature.
To achieve the goals above, the present invention is to realize by the following technical solutions: a kind of Nb-W-ZrC-B alloy,
Be made of the raw material of following mass percent: W 5%-35%, ZrC 2%-8%, B 1%-5%, surplus are Nb and can not keep away
The impurity exempted from.
Preferably, the Nb-W-ZrC-B alloy, is made of the raw material of following mass percent: W 10%-30%,
ZrC 3%-7%, B 2%-4%, surplus are Nb and inevitable impurity.
Preferably, the Nb-W-ZrC-B alloy, is made of the raw material of following mass percent: W 20%, ZrC
5%, B 3%, surplus are Nb and inevitable impurity.
A kind of preparation method of Nb-W-ZrC-B alloy, preparation step are as follows:
(1) that W powder, ZrC powder, B powder and Nb powder are placed in ball milling mixing in ball mill is uniform, then dries under vacuum conditions
It is dry, mixed powder is obtained after crushing；
(2) mixed powder is placed in hot-pressed sintering furnace, is not more than 1.3 × 10 in vacuum degree-2Pa, temperature 1600
DEG C -1900 DEG C, pressure be hot pressed sintering 1h-3h under conditions of 20MPa-40MPa, Nb-W-ZrC-B sintering is obtained after furnace cooling
Body；
It (3) is 1200 DEG C -1500 DEG C in temperature by the sintered body, extrusion ratio is squeezed under conditions of being 7-11, from
The processing that strips off the skin so is carried out after cooling, obtains Nb-W-ZrC-B alloy.
Preferably, the quality purity of W powder, ZrC powder, B powder in the step (1) is not less than 99.5%, Nb powder
Quality purity be not less than 99.9%；W powder, Nb powder partial size no more than 20 μm, the partial size of ZrC powder is not more than 3 μm, B powder
Partial size is not more than 5 μm.
Preferably, the mode of ball milling is wet ball grinding in the step (1), used during the wet ball grinding
Dehydrated alcohol is dispersing agent, and the volume of the dehydrated alcohol is 1-3 times of W powder, ZrC powder, B powder and Nb powder quality sum, wherein
The unit of volume is mL, and the unit of quality is g；The revolving speed of ball mill is 200rpm-400rpm, the ball material mass ratio of wet ball grinding
For (5-9): 1, Ball-milling Time 6h-10h.
Preferably, the drying temperature in the step (1) is 80 DEG C -90 DEG C.
Beneficial effects of the present invention: the Nb-W-ZrC-B alloy tensile strength at room temperature of this method preparation is
859MPa-1120MPa, room temperature tensile elongation percentage are 15%-27%, and 1400 DEG C of tensile strength are 354MPa-457MPa, 1400
Material loss only has 1.60mg/cm after aoxidizing 100h in DEG C air environment2-0.82mg/cm2, there is good comprehensive mechanical property
And antioxygenic property, it can use, have a extensive future in 1400 DEG C of air environments.
Detailed description of the invention
The following describes the present invention in detail with reference to the accompanying drawings and specific embodiments；
Fig. 1 is the micro-organization chart of Nb-W-ZrC-B alloy prepared by the embodiment of the present invention 1.
Specific embodiment
To be easy to understand the technical means, the creative features, the aims and the efficiencies achieved by the present invention, below with reference to
Specific embodiment, the present invention is further explained.
Referring to Fig.1, present embodiment uses a kind of following technical scheme: Nb-W-ZrC-B alloy, by following quality
The raw material of percentage forms: W 5%-35%, ZrC 2%-8%, B 1%-5%, and surplus is Nb and inevitable impurity.
It is worth noting that, described W, ZrC, B and the Nb is powder raw material, wherein W powder, ZrC powder, the quality of B powder are pure
Degree is not less than 99.9% not less than the quality purity of 99.5%, Nb powder；W powder, Nb powder partial size no more than 20 μm, ZrC powder
Partial size be not more than 3 μm, the partial size of B powder is not more than 5 μm.
A kind of preparation method of Nb-W-ZrC-B alloy, preparation step are as follows:
(1) that W powder, ZrC powder, B powder and Nb powder are placed in ball milling mixing in ball mill is uniform, then dries under vacuum conditions
Dry, drying temperature is 80 DEG C -90 DEG C, obtains mixed powder after crushing；
(2) mixed powder is placed in hot-pressed sintering furnace, is not more than 1.3 × 10 in vacuum degree-2Pa, temperature 1600
DEG C -1900 DEG C, pressure be hot pressed sintering 1h-3h under conditions of 20MPa-40MPa, Nb-W-ZrC-B sintering is obtained after furnace cooling
Body；
It (3) is 1200 DEG C -1500 DEG C in temperature by the sintered body, extrusion ratio is squeezed under conditions of being 7-11, from
The processing that strips off the skin so is carried out after cooling, obtains Nb-W-ZrC-B alloy.
It is worth noting that, the mode of ball milling is wet ball grinding in the step (1), during the wet ball grinding
Use dehydrated alcohol for dispersing agent, the volume of the dehydrated alcohol is 1-3 times of W powder, ZrC powder, B powder and Nb powder quality sum,
Wherein the unit of volume is mL, and the unit of quality is g；The revolving speed of ball mill is 200rpm-400rpm, the ball material matter of wet ball grinding
Amount is than being (5-9): 1, Ball-milling Time 6h-10h.
B is introduced into Nb-W-ZrC-B alloy by present embodiment, can eliminate objectionable impurities oxygen during the sintering process
In the detrimental effect of crystal boundary, i.e., the mechanical behavior under high temperature of Nb-W-ZrC-B alloy, on the other hand, B are improved by purification crystal boundary
The part alloying caused by crystal boundary segregation, enhances crystal boundary, to further improve Nb-W-ZrC-B alloy high-temp power
Learn performance.
It is made of using the microstructure of the Nb-W-ZrC-B alloy of this method preparation continuously distributed Nb matrix, it is tiny
ZrC ceramic phase is uniformly distributed in niobium matrix, and this desired tissue, which makes Nb-W-ZrC-B alloy at room temperature, has good modeling
Property, there is under high temperature very high intensity.Meanwhile present embodiment is directed to the deficiency of existing niobium alloy, is dissolved using W strong
Change, ZrC second-phase dispersion reinforcing, and Nb-W-ZrC-B alloy is prepared by hot pressed sintering+hot extrusion technique process, makes small
ZrC ceramic phase particles even dispersion is distributed on niobium matrix, to make Nb-W-ZrC-B Alloy At Room Temperature mechanical property, high-temperature mechanics
Performance and antioxygenic property are significantly improved.
Present embodiment is using hot pressed sintering+hot extrusion technique process preparation Ta-W-Al-Al2O3Alloy, in room
Tensile strength under the conditions of temperature is 859MPa-1120MPa, and room temperature tensile elongation percentage is 15%-27%, and 1400 DEG C of tensile strength are
354MPa-457MPa, material loss only has 1.60mg/cm after aoxidizing 100h in 1400 DEG C of air environments2-0.82mg/cm2, tool
There are good comprehensive mechanical property and antioxygenic property, can be used in 1400 DEG C of air environments.
Embodiment 1: a kind of Nb-W-ZrC-B alloy is made of the raw material of following mass percent: W 20%, ZrC 5%,
B 3%, surplus are Nb and inevitable impurity, and wherein W, ZrC, B and Nb are powder raw material, the matter of W powder, ZrC powder, B powder
Amount purity is not less than the quality purity of 99.5%, Nb powder not less than 99.9%；W powder, Nb powder partial size no more than 20 μm,
The partial size of ZrC powder is not more than 3 μm, and the partial size of B powder is not more than 5 μm.
The preparation method of the Nb-W-ZrC-B alloy the following steps are included:
(1) W powder, ZrC powder, B powder and Nb powder are placed in ball mill, are uniformly mixed by the way of wet ball grinding, then
It dries under vacuum conditions, drying temperature is 85 DEG C, crushes after drying and obtains mixed powder；The wherein dispersion that wet ball grinding uses
Agent is dehydrated alcohol, and the volume of dehydrated alcohol is 1.5 times of W powder, ZrC powder, B powder and Nb powder quality sum, wherein the list of volume
Position is mL, and the unit of quality is g；The ball mill is planetary ball mill, and the revolving speed of ball mill is 300rpm, wet ball grinding
Ball material mass ratio is calculated as 7:1, Ball-milling Time 8h in mass ratio.
(2) mixed powder is placed in hot-pressed sintering furnace, is 1.3 × 10 in vacuum degree-2Pa, temperature are 1750 DEG C, pressure
For hot pressed sintering 2h under conditions of 30MPa, Nb-W-ZrC-B sintered body is obtained after furnace cooling.
(3) sintered body is squeezed under conditions of temperature is 1350 DEG C, extrusion ratio is 9, natural cooling is laggard
The capable processing that strips off the skin, obtains Nb-W-ZrC-B alloy.
The microscopic structure of Nb-W-ZrC-B alloy manufactured in the present embodiment is as shown in Figure 1, it will be seen from figure 1 that Nb-W-
ZrC-B alloy is made of continuously distributed Nb matrix, and tiny ZrC ceramic phase is uniformly distributed in Nb matrix, and microstructure does not have
Observe that micro-crack, material are almost fine and close.Grey colour contrast is Nb matrix phase in Fig. 1, and white particle is ZrC ceramics
Phase, equally distributed tiny ZrC ceramic strengthening phase greatly improve the room temperature and elevated temperature strength of Nb-W-ZrC-B alloy；Separately
On the one hand, it is made of due to matrix the Nb of good plasticity, and in continuously distributed, therefore, Nb-W-ZrC-B alloy is at room temperature
With preferable plasticity, this is conducive to the reliability for shaping and improving materials'use of material.In high temperature oxidative atmosphere,
The protective oxide skin(coating) of ceramic phase oxidation self-generating, realizes oxidation resistant function in Nb-W-ZrC-B alloy.
Further test the chemical component of each phase of Nb-W-ZrC-B alloy manufactured in the present embodiment, the results showed that W is mainly solid
It is dissolved in Nb, B is mainly distributed on crystal boundary.Since B and oxygen have very high affinity, the work of degassing can be played during the sintering process
With elimination objectionable impurities oxygen improves the high temperature of Nb-W-ZrC-B alloy in the detrimental effect of crystal boundary by purification crystal boundary
Mechanical property；On the other hand, B part alloying caused by crystal boundary segregation, also provides enhanced crystal boundary.Nb-W-ZrC-B alloy exists
In high-temperature oxidation process, B reduces the rate that oxonium ion is spread to Nb matrix, and can improve the intensity of oxide layer, in sustained release
Stress, the generation for reducing crackle are conducive to surface oxide layer densification, reduce porosity and stop expansion of the oxygen to Nb intrinsic silicon
It dissipates, improves the high-temperature oxidation resistance of Nb-W-ZrC-B alloy, W is mainly solid-solubilized in the room temperature and high temperature for improving matrix in Nb
Mechanical property.
The tensile strength of Nb-W-ZrC-B alloy manufactured in the present embodiment at room temperature is 1120MPa, room temperature tensile
Elongation percentage is 27%, and 1400 DEG C of tensile strength are 457MPa, and material loss only has after aoxidizing 100h in 1400 DEG C of air environments
0.82mg/cm2, there is good comprehensive mechanical property and antioxygenic property, can be used in 1400 DEG C of air environments.
Embodiment 2: a kind of Nb-W-ZrC-B alloy is made of the raw material of following mass percent: W 10%, ZrC 3%,
B 2%, surplus are Nb and inevitable impurity, and wherein W, ZrC, B and Nb are powder raw material, the matter of W powder, ZrC powder, B powder
Amount purity is not less than the quality purity of 99.5%, Nb powder not less than 99.9%；W powder, Nb powder partial size no more than 20 μm,
The partial size of ZrC powder is not more than 3 μm, and the partial size of B powder is not more than 5 μm.
The preparation method of the Nb-W-ZrC-B alloy the following steps are included:
(1) W powder, ZrC powder, B powder and Nb powder are placed in ball mill, are uniformly mixed by the way of wet ball grinding, then
It dries under vacuum conditions, drying temperature is 85 DEG C, crushes after drying and obtains mixed powder；The wherein dispersion that wet ball grinding uses
Agent is dehydrated alcohol, and the volume of dehydrated alcohol is 1.5 times of W powder, ZrC powder, B powder and Nb powder quality sum, wherein the list of volume
Position is mL, and the unit of quality is g；The ball mill is planetary ball mill, and the revolving speed of ball mill is 300rpm, wet ball grinding
Ball material mass ratio is calculated as 7:1, Ball-milling Time 8h in mass ratio.
(2) mixed powder is placed in hot-pressed sintering furnace, is 1.3 × 10 in vacuum degree-2Pa, temperature are 1750 DEG C, pressure
For hot pressed sintering 2h under conditions of 30MPa, Nb-W-ZrC-B sintered body is obtained after furnace cooling.
(3) sintered body is squeezed under conditions of temperature is 1350 DEG C, extrusion ratio is 9, natural cooling is laggard
The capable processing that strips off the skin, obtains Nb-W-ZrC-B alloy.
The tensile strength of Nb-W-ZrC-B alloy manufactured in the present embodiment at room temperature is 1110MPa, room temperature tensile
Elongation percentage is 15%, and 1400 DEG C of tensile strength are 354MPa, and material loss only has after aoxidizing 100h in 1400 DEG C of air environments
1.60mg/cm2, there is good comprehensive mechanical property and antioxygenic property, can be used in 1400 DEG C of air environments.
Embodiment 3: a kind of Nb-W-ZrC-B alloy is made of the raw material of following mass percent: W 30%, ZrC 7%,
B 4%, surplus are Nb and inevitable impurity, and wherein W, ZrC, B and Nb are powder raw material, the matter of W powder, ZrC powder, B powder
Amount purity is not less than the quality purity of 99.5%, Nb powder not less than 99.9%；W powder, Nb powder partial size no more than 20 μm,
The partial size of ZrC powder is not more than 3 μm, and the partial size of B powder is not more than 5 μm.
The preparation method of the Nb-W-ZrC-B alloy the following steps are included:
(1) W powder, ZrC powder, B powder and Nb powder are placed in ball mill, are uniformly mixed by the way of wet ball grinding, then
It dries under vacuum conditions, drying temperature is 85 DEG C, crushes after drying and obtains mixed powder；The wherein dispersion that wet ball grinding uses
Agent is dehydrated alcohol, and the volume of dehydrated alcohol is 1.5 times of W powder, ZrC powder, B powder and Nb powder quality sum, wherein the list of volume
Position is mL, and the unit of quality is g；The ball mill is planetary ball mill, and the revolving speed of ball mill is 300rpm, wet ball grinding
Ball material mass ratio is calculated as 7:1, Ball-milling Time 8h in mass ratio.
(2) mixed powder is placed in hot-pressed sintering furnace, is 1.3 × 10 in vacuum degree-2Pa, temperature are 1750 DEG C, pressure
For hot pressed sintering 2h under conditions of 30MPa, Nb-W-ZrC-B sintered body is obtained after furnace cooling.
(3) sintered body is squeezed under conditions of temperature is 1350 DEG C, extrusion ratio is 9, natural cooling is laggard
The capable processing that strips off the skin, obtains Nb-W-ZrC-B alloy.
The tensile strength of Nb-W-ZrC-B alloy manufactured in the present embodiment at room temperature is 1110MPa, room temperature tensile
Elongation percentage is 15%, and 1400 DEG C of tensile strength are 450MPa, and material loss only has after aoxidizing 100h in 1400 DEG C of air environments
1.52mg/cm2, there is good comprehensive mechanical property and antioxygenic property, can be used in 1400 DEG C of air environments.
Embodiment 4: a kind of Nb-W-ZrC-B alloy is made of: W20%, ZrC 6%, B the raw material of following mass percent
3%, surplus is Nb and inevitable impurity, and wherein W, ZrC, B and Nb are powder raw material, the quality of W powder, ZrC powder, B powder
Purity is not less than the quality purity of 99.5%, Nb powder not less than 99.9%；W powder, Nb powder partial size no more than 20 μm, ZrC
The partial size of powder is not more than 3 μm, and the partial size of B powder is not more than 5 μm.
The preparation method of the Nb-W-ZrC-B alloy the following steps are included:
(1) W powder, ZrC powder, B powder and Nb powder are placed in ball mill, are uniformly mixed by the way of wet ball grinding, then
It dries under vacuum conditions, drying temperature is 80 DEG C, crushes after drying and obtains mixed powder；The wherein dispersion that wet ball grinding uses
Agent is dehydrated alcohol, and the volume of dehydrated alcohol is 1 times of W powder, ZrC powder, B powder and Nb powder quality sum, wherein the unit of volume
For mL, the unit of quality is g；The ball mill is planetary ball mill, and the revolving speed of ball mill is 300rpm, the ball of wet ball grinding
Material mass ratio is calculated as 5:1, Ball-milling Time 6h in mass ratio.
(2) mixed powder is placed in hot-pressed sintering furnace, is 1.3 × 10 in vacuum degree-2Pa, temperature are 1600 DEG C, pressure
For hot pressed sintering 1h under conditions of 20MPa, Nb-W-ZrC-B sintered body is obtained after furnace cooling.
(3) sintered body is squeezed under conditions of temperature is 1200 DEG C, extrusion ratio is 7, natural cooling is laggard
The capable processing that strips off the skin, obtains Nb-W-ZrC-B alloy.
The tensile strength of Nb-W-ZrC-B alloy manufactured in the present embodiment at room temperature is 912MPa, and room temperature tensile prolongs
Stretching rate is 21%, and 1400 DEG C of tensile strength are 398MPa, and material loss only has after aoxidizing 100h in 1400 DEG C of air environments
1.32mg/cm2, there is good comprehensive mechanical property and antioxygenic property, can be used in 1400 DEG C of air environments.
Embodiment 5: a kind of Nb-W-ZrC-B alloy is made of: W20%, ZrC 6%, B the raw material of following mass percent
3%, surplus is Nb and inevitable impurity, and wherein W, ZrC, B and Nb are powder raw material, the quality of W powder, ZrC powder, B powder
Purity is not less than the quality purity of 99.5%, Nb powder not less than 99.9%；W powder, Nb powder partial size no more than 20 μm, ZrC
The partial size of powder is not more than 3 μm, and the partial size of B powder is not more than 5 μm.
The preparation method of the Nb-W-ZrC-B alloy the following steps are included:
(1) W powder, ZrC powder, B powder and Nb powder are placed in ball mill, are uniformly mixed by the way of wet ball grinding, then
It dries under vacuum conditions, drying temperature is 90 DEG C, crushes after drying and obtains mixed powder；The wherein dispersion that wet ball grinding uses
Agent is dehydrated alcohol, and the volume of dehydrated alcohol is 3 times of W powder, ZrC powder, B powder and Nb powder quality sum, wherein the unit of volume
For mL, the unit of quality is g；The ball mill is planetary ball mill, and the revolving speed of ball mill is 300rpm, the ball of wet ball grinding
Material mass ratio is calculated as 9:1, Ball-milling Time 10h in mass ratio.
(2) mixed powder is placed in hot-pressed sintering furnace, is 1.3 × 10 in vacuum degree-2Pa, temperature are 1900 DEG C, pressure
For hot pressed sintering 3h under conditions of 40MPa, Nb-W-ZrC-B sintered body is obtained after furnace cooling.
(3) sintered body is squeezed under conditions of temperature is 1500 DEG C, extrusion ratio is 11, natural cooling is laggard
The capable processing that strips off the skin, obtains Nb-W-ZrC-B alloy.
The tensile strength of Nb-W-ZrC-B alloy manufactured in the present embodiment at room temperature is 1022MPa, room temperature tensile
Elongation percentage is 23%, and 1400 DEG C of tensile strength are 435MPa, and material loss only has after aoxidizing 100h in 1400 DEG C of air environments
1.26mg/cm2, there is good comprehensive mechanical property and antioxygenic property, can be used in 1400 DEG C of air environments.
Embodiment 6: a kind of Nb-W-ZrC-B alloy is made of: W5%, ZrC 2%, B the raw material of following mass percent
1%, surplus is Nb and inevitable impurity, and wherein W, ZrC, B and Nb are powder raw material, the quality of W powder, ZrC powder, B powder
Purity is not less than the quality purity of 99.5%, Nb powder not less than 99.9%；W powder, Nb powder partial size no more than 20 μm, ZrC
The partial size of powder is not more than 3 μm, and the partial size of B powder is not more than 5 μm.
The preparation method of the Nb-W-ZrC-B alloy the following steps are included:
(1) W powder, ZrC powder, B powder and Nb powder are placed in ball mill, are uniformly mixed by the way of wet ball grinding, then
It dries under vacuum conditions, drying temperature is 85 DEG C, crushes after drying and obtains mixed powder；The wherein dispersion that wet ball grinding uses
Agent is dehydrated alcohol, and the volume of dehydrated alcohol is 1.5 times of W powder, ZrC powder, B powder and Nb powder quality sum, wherein the list of volume
Position is mL, and the unit of quality is g；The ball mill is planetary ball mill, and the revolving speed of ball mill is 300rpm, wet ball grinding
Ball material mass ratio is calculated as 7:1, Ball-milling Time 8h in mass ratio.
(2) mixed powder is placed in hot-pressed sintering furnace, is 1.3 × 10 in vacuum degree-2Pa, temperature are 1750 DEG C, pressure
For hot pressed sintering 2h under conditions of 30MPa, Nb-W-ZrC-B sintered body is obtained after furnace cooling.
(3) sintered body is squeezed under conditions of temperature is 1350 DEG C, extrusion ratio is 9, natural cooling is laggard
The capable processing that strips off the skin, obtains Nb-W-ZrC-B alloy.
The tensile strength of Nb-W-ZrC-B alloy manufactured in the present embodiment at room temperature is 979MPa, and room temperature tensile prolongs
Stretching rate is 21%, and 1400 DEG C of tensile strength are 422MPa, and material loss only has after aoxidizing 100h in 1400 DEG C of air environments
1.57mg/cm2, there is good comprehensive mechanical property and antioxygenic property, can be used in 1400 DEG C of air environments.
Embodiment 7: a kind of Nb-W-ZrC-B alloy is made of: W35%, ZrC 8%, B the raw material of following mass percent
5%, surplus is Nb and inevitable impurity, and wherein W, ZrC, B and Nb are powder raw material, the quality of W powder, ZrC powder, B powder
Purity is not less than the quality purity of 99.5%, Nb powder not less than 99.9%；W powder, Nb powder partial size no more than 20 μm, ZrC
The partial size of powder is not more than 3 μm, and the partial size of B powder is not more than 5 μm.
The preparation method of the Nb-W-ZrC-B alloy the following steps are included:
(1) W powder, ZrC powder, B powder and Nb powder are placed in ball mill, are uniformly mixed by the way of wet ball grinding, then
It dries under vacuum conditions, drying temperature is 85 DEG C, crushes after drying and obtains mixed powder；The wherein dispersion that wet ball grinding uses
Agent is dehydrated alcohol, and the volume of dehydrated alcohol is 1.5 times of W powder, ZrC powder, B powder and Nb powder quality sum, wherein the list of volume
Position is mL, and the unit of quality is g；The ball mill is planetary ball mill, and the revolving speed of ball mill is 300rpm, wet ball grinding
Ball material mass ratio is calculated as 7:1, Ball-milling Time 8h in mass ratio.
(2) mixed powder is placed in hot-pressed sintering furnace, is 1.3 × 10 in vacuum degree-2Pa, temperature are 1750 DEG C, pressure
For hot pressed sintering 2h under conditions of 30MPa, Nb-W-ZrC-B sintered body is obtained after furnace cooling.
(3) sintered body is squeezed under conditions of temperature is 1350 DEG C, extrusion ratio is 9, natural cooling is laggard
The capable processing that strips off the skin, obtains Nb-W-ZrC-B alloy.
The tensile strength of Nb-W-ZrC-B alloy manufactured in the present embodiment at room temperature is 978MPa, and room temperature tensile prolongs
Stretching rate is 19%, and 1400 DEG C of tensile strength are 455MPa, and material loss only has after aoxidizing 100h in 1400 DEG C of air environments
1.39mg/cm2, there is good comprehensive mechanical property and antioxygenic property, can be used in 1400 DEG C of air environments.
Embodiment 8: a kind of Nb-W-ZrC-B alloy is made of: W5%, ZrC 2%, B the raw material of following mass percent
5%, surplus is Nb and inevitable impurity, and wherein W, ZrC, B and Nb are powder raw material, the quality of W powder, ZrC powder, B powder
Purity is not less than the quality purity of 99.5%, Nb powder not less than 99.9%；W powder, Nb powder partial size no more than 20 μm, ZrC
The partial size of powder is not more than 3 μm, and the partial size of B powder is not more than 5 μm.
The preparation method of the Nb-W-ZrC-B alloy the following steps are included:
(1) W powder, ZrC powder, B powder and Nb powder are placed in ball mill, are uniformly mixed by the way of wet ball grinding, then
It dries under vacuum conditions, drying temperature is 85 DEG C, crushes after drying and obtains mixed powder；The wherein dispersion that wet ball grinding uses
Agent is dehydrated alcohol, and the volume of dehydrated alcohol is 1.5 times of W powder, ZrC powder, B powder and Nb powder quality sum, wherein the list of volume
Position is mL, and the unit of quality is g；The ball mill is planetary ball mill, and the revolving speed of ball mill is 300rpm, wet ball grinding
Ball material mass ratio is calculated as 7:1, Ball-milling Time 8h in mass ratio.
(2) mixed powder is placed in hot-pressed sintering furnace, is 1.3 × 10 in vacuum degree-2Pa, temperature are 1750 DEG C, pressure
For hot pressed sintering 2h under conditions of 30MPa, Nb-W-ZrC-B sintered body is obtained after furnace cooling.
(3) sintered body is squeezed under conditions of temperature is 1350 DEG C, extrusion ratio is 9, natural cooling is laggard
The capable processing that strips off the skin, obtains Nb-W-ZrC-B alloy.
The tensile strength of Nb-W-ZrC-B alloy manufactured in the present embodiment at room temperature is 1110MPa, room temperature tensile
Elongation percentage is 23%, and 1400 DEG C of tensile strength are 439MPa, and material loss only has after aoxidizing 100h in 1400 DEG C of air environments
1.45mg/cm2, there is good comprehensive mechanical property and antioxygenic property, can be used in 1400 DEG C of air environments.
Embodiment 9: a kind of Nb-W-ZrC-B alloy is made of: W35%, ZrC 8%, B the raw material of following mass percent
1%, surplus is Nb and inevitable impurity, and wherein W, ZrC, B and Nb are powder raw material, the quality of W powder, ZrC powder, B powder
Purity is not less than the quality purity of 99.5%, Nb powder not less than 99.9%；W powder, Nb powder partial size no more than 20 μm, ZrC
The partial size of powder is not more than 3 μm, and the partial size of B powder is not more than 5 μm.
The preparation method of the Nb-W-ZrC-B alloy the following steps are included:
(1) W powder, ZrC powder, B powder and Nb powder are placed in ball mill, are uniformly mixed by the way of wet ball grinding, then
It dries under vacuum conditions, drying temperature is 85 DEG C, crushes after drying and obtains mixed powder；The wherein dispersion that wet ball grinding uses
Agent is dehydrated alcohol, and the volume of dehydrated alcohol is 1.5 times of W powder, ZrC powder, B powder and Nb powder quality sum, wherein the list of volume
Position is mL, and the unit of quality is g；The ball mill is planetary ball mill, and the revolving speed of ball mill is 300rpm, wet ball grinding
Ball material mass ratio is calculated as 7:1, Ball-milling Time 8h in mass ratio.
(2) mixed powder is placed in hot-pressed sintering furnace, is 1.3 × 10 in vacuum degree-2Pa, temperature are 1750 DEG C, pressure
For hot pressed sintering 2h under conditions of 30MPa, Nb-W-ZrC-B sintered body is obtained after furnace cooling.
(3) sintered body is squeezed under conditions of temperature is 1350 DEG C, extrusion ratio is 9, natural cooling is laggard
The capable processing that strips off the skin, obtains Nb-W-ZrC-B alloy.
The tensile strength of Nb-W-ZrC-B alloy manufactured in the present embodiment at room temperature is 869MPa, and room temperature tensile prolongs
Stretching rate is 19%, and 1400 DEG C of tensile strength are 399MPa, and material loss only has after aoxidizing 100h in 1400 DEG C of air environments
1.35mg/cm2, there is good comprehensive mechanical property and antioxygenic property, can be used in 1400 DEG C of air environments.
The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the above embodiments and description only describe this
The principle of invention, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these changes
Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and its
Equivalent thereof.
Claims (10)
1. a kind of Nb-W-ZrC-B alloy, which is characterized in that be made of the raw material of following mass percent: W 5%-35%, ZrC
2%-8%, B 1%-5%, surplus are Nb and inevitable impurity.
2. a kind of Nb-W-ZrC-B alloy according to claim 1, which is characterized in that by the raw material of following mass percent
Composition: W 10%-30%, ZrC 3%-7%, B 2%-4%, surplus are Nb and inevitable impurity.
3. a kind of Nb-W-ZrC-B alloy according to claim 2, which is characterized in that by the raw material of following mass percent
Composition: W 20%, ZrC 5%, B 3%, surplus are Nb and inevitable impurity.
4. a kind of preparation method of Nb-W-ZrC-B alloy, which is characterized in that its preparation step are as follows:
(1) that W powder, ZrC powder, B powder and Nb powder are placed in ball milling mixing in ball mill is uniform, then dries under vacuum conditions, powder
Mixed powder is obtained after broken；
(2) mixed powder is placed in hot-pressed sintering furnace, is not more than 1.3 × 10 in vacuum degree-2Pa, temperature be 1600 DEG C-
1900 DEG C, pressure be 20MPa-40MPa under conditions of hot pressed sintering 1h-3h, Nb-W-ZrC-B sintered body is obtained after furnace cooling；
(3) sintered body is squeezed, the processing that strips off the skin is carried out after natural cooling, obtain Nb-W-ZrC-B alloy.
5. a kind of preparation method of Nb-W-ZrC-B alloy according to claim 4, which is characterized in that the step
(1) quality purity of W powder, ZrC powder, B powder in is not less than the quality purity of 99.5%, Nb powder not less than 99.9%.
6. a kind of preparation method of Nb-W-ZrC-B alloy according to claim 4, which is characterized in that the step
(1) partial size of W powder, Nb powder in is no more than 20 μm, and the partial size of ZrC powder is not more than 3 μm, and the partial size of B powder is not more than 5 μm.
7. a kind of preparation method of Nb-W-ZrC-B alloy according to claim 4, which is characterized in that the step
(1) mode of ball milling is wet ball grinding in, uses dehydrated alcohol for dispersing agent during the wet ball grinding, the anhydrous second
The volume of alcohol is 1-3 times of W powder, ZrC powder, B powder and Nb powder quality sum, and wherein the unit of volume is mL, and the unit of quality is
g。
8. a kind of preparation method of Nb-W-ZrC-B alloy according to claim 4, which is characterized in that the step
(1) revolving speed of ball mill is 200rpm-400rpm in, and the ball material mass ratio of wet ball grinding is (5-9): 1, Ball-milling Time 6h-
10h。
9. a kind of preparation method of Nb-W-ZrC-B alloy according to claim 4, which is characterized in that the step
(1) drying temperature in is 80 DEG C -90 DEG C.
10. a kind of preparation method of Nb-W-ZrC-B alloy according to claim 4, which is characterized in that the step
(3) sintered body is squeezed under conditions of temperature is 1200 DEG C -1500 DEG C, extrusion ratio is 7-11 in.
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| DE102006017820A1 (en) * | 2006-04-13 | 2007-10-18 | General Electric Co. | Heat stable composition containing Nb and Si in which the Si content is less than 9 atom.% and containing at least one element selected from Tim Hf, Cr and Al useful in gas turbine technology |
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